Stop-motion for knitting-machines.



W. w. BURKE. STOP MOTION FOR KNITTING MACHINES. APPLICATION FILED MAY10A 1913.

1,096,890 I Patented May 19,1914.

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W. W. BURKE.

STOP MOTION FOR KNITTING MACHINES.

APPLICATION rum) MAY 10, 191;;

4 SHEETS--SHEBT 2.

Penented May 19, 1914.

W. W. BURKE. v, STOP MOTION FOR KNITTING MACHINES.

APPLICATION FILED MAY 10. I913.

Patented May 19, 1914 4 S HEETS-SHLET 3.

a? I l W. w. BURKE. STOP MOTION FOR KNITTING MACHINES APPLICATION FILEDMAY10,1913.

1,096,890. Patented May 19, 1914.

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rirrnn srntrne rntrnrnr oirriuiin \VILLIAM 'W. BURKE, OFBENNINGTON,'VER1VOl\lT, ASSIGNOR 0F ONE-FOURTH 'lU JAMES E. BURKE ANDONEFOURTH T0 ALEXANDER J. COOPER, BOTH 0 BEN NINGTON, VERMONT.

STOP-MOTION FOR KNITTING-MACHUJES.

Ii .tltlltid'iltitl.

Specification of Letters Patent.

'Ilnt cin'lcil litany iii. iii i i.

Application filed May 10. 1913 Serial No. 766,685.

and useful Improvements.in tltop-idotioim; for Iinitting-Machines, oiwhich the following; is n specification.

This invention relates to an electric circuit (losing deviceparticularly adapted to he need in muehinerl employing :1 thread orstrand of ynrin such as knitting machines, said device emhodjring in its;construction :1 drop device which is ndnpt'lil to open and elosc saidelectric eireuit, lhedeviee being so eoImiruuti-d and arranged than;when :1

threud or yurn hreuks 'or when nhuormul tension is hroupght to hear uponsaid thread or yarn, the drop device will he operated to close thecircuit. Said circuit comprises un armature and an eleetronmgnet, theairline ture being mounted upon it tripper forming it part of a stopmotion device which is so constructed thilt when the circuit is closedand the nrnmture drawn toward the magnetot the electronhugnet, saidtripper will operute to release the stop iiifitiOlllllQtfilltliliSll'lund allow the same to operute 'to move the belt from the tight mlley tothe loose pulley on the driving shaft and thus stop the machine. i i

In the embodiment of iny invention hereinafter. described I have shownmy improved electriccircuit closing devi :e ineonneetion with :iknitting machine and a stop motion therefor, but tilQ'SilIllQ is adoptedto he used in iiny machine employing :l strand of or a thread in whichit is desirable to have the machine stop when the thread breaks or thesupply from the mess ofthrend runs out or when abnormal tension isapplied to said thread or yarn.

in the preparation of yarn for use in o.

knitting machine for knittin a fabric the some is ordinarily run througha winding machine in which the yarn is taken from a thread nines, knownas a ftcone, and is passed thronglfa scraper which removes the suprtluons yarn and detects any large knots and stops the feed of the yarnfrom the cone when such large knots occur, said yarn pass"- ing from thecone to the scraper and from the scraper to a hohhin upon which it iswound and these bobbins, with the yarn yarn l i l l l l l wound thereon,are then used to .eupply yarn to :1 knitting}; nnu-hine. liy my improvedcircuit elm-dug device. in .-omhinntiou with u .-:r.'ruper interposedhetween said circuit eles inc derive and u ('Uilt' oi. yarn, superfluouswaste i removed from the yarn :uulynru with larg hnoh: prevented fromfeeding to the knittingi1eitrumentoiitice; with out tirst panning theyarn through it win/lin g llliti'illllt. hereiuliel'ore (lLHl'l'ilJtTtl,prior to using: the moo in d knitting innchine. nod thus one o nu'ntion:ind nuichine t: eliminated, wherehy u lurgze unmunt oi time and expenreis illlt'i'ii.

'lhe ohieet of this invention, theretore, is

to euihody n e knitting onu'hiue :i ynrn scraper for removing thefitll'flli'illi ltS ynrn lrom strand of the mime :15 iii liming; t edinto sold machine. said temper also being no adjusted as to prermn': thepursiigge of yarn into n mneliiuc irliemn hirer knot occurs in the yarn;and to combine with said s raper on electric circuit closing device ofthe rhurmiter hereinhel'ore set forth tQlQZ lt'iitll with it stop motionmeelninisnn all so arr-tinged Hid eomstructed that the niuehine will heetcpped immediately when u threud or yurn hr eeke or when uhnornmltern-d n is: lnought to hear upon said thread or yum: or hell the.supply of thread or ynrn runs: out. The invention consists in thecombination nod arrangrenwnt of parts set forth in the followings])eeitieution and particularly pointed out H1 the claims thereof.

Referring; to the drawings: liigure i is a plan. View, partly in sectionand broken away, of :1 stop motion mechanism for :1 knitting machinewith my improved electric circuit chising device attached thereto. Fig.2 is; :1 detail neetioi'iol elevation tulten on line ot fl igi '1. Fig;3% is; :t perspi'retire View of the electric circuit closing, device.Figr. -1, is n pitltl View of said electric circuit dosing device. l ig.5 a "front elevation of the electric circuit ciosin device with theports in their normal .iosnion when the yarn is feeding to the [1130due. Fig. (3 is n front el ration ot the electric circuit, elcsingderive simiinr to :ifiittf. 5, partly lnulit'ii away and shown insection and with the parts in the position hemmed thereby when nhnori idteneion is implied to the yarn. ll ig T is u detuil end elevation of thecircuit closing device as viewed from the lett of Fig.5. Fig. 8 is asectional elevation taken on line 88 of Fig. i. Fig. 9 is a detailed endelevation of the circuit closing device -as viewed from the right ofFig. 5. Fig. 10 is a rear elevation of the stop motion mech anism withparts broken away to save space in the drawings. Fig. 11 is a frontelevation of a modified form of circuit closing device with means forcutting ofi the yarn attached thereto. Fig. 12 is a sectional elevationtaken on linelQ-IQ of Fig. 11. Fig. 13 is a front elevation of thecircuit closing device with another form of means for cutting off theyarn attached thereto.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, referring to Figs. 1 to 10 inclusive, 15 is the frameof the machine consisting of side standards 16 and 17 suitably connectedtogether by a cross head 18. The main driving shaft 19 is journaled tovrotate in bearings 20 and 21 fast. to the 7 frame of the machine and isrotated b ranged to rock in means of a pulley 22 fastto the shaft 19, aloose pulley 23 being journaled' to rotate upon the shaft 19 adjacent tothe pulley 22. The pulley 22 is driven by means of a belt 24. A bevelgear 25 is fastened to the main driving shaft 19 and meshes into anotherbevel gear 26 fast to a vertical shaft 2*, said vertical shaft beingutilized for rotating the needle cylinders 28 and 29, Fig. 2. The mannerin which these needle cylinders and co-acting parts are constructedvandoperated from the shaft 27 is clearly described and shown in patent toi/"i' illiam T. Barratt No. 1,000,362 dated Augustjl5, l9ll,stop motionfor knitting machines, to which reterence may be had. P

The stop motion mechanism is illustrated particularly in Figs. 1, 9, and10;. Referring now to theseijfignres it will be seen that a wheel 30 isjournaled to rotateupon a stud 31 fast to a bracket 32 which is; inturn, fastened to the cross head or tie 18 An arm 33 is pivoted at 34 tothe wheel. 30 and is held against a stop screw 35 by a spiral spring 36.A plurality of these arms 33 and n echanism connected thereto connectionwith the wheel 30. but as they all operate in substantially the samemanner the following description of the mechanism connected with one ofsaid arms will be sutiicient. A red 37 is pivotally connected at 38 tothe wheel 30. Said rod is arranged to slide in a bracket fast to thecross head 18. The free end of the rod 37 bears against an arm 40whichis fast to a rock-shaft; ll arthe frame of the machine. Ranches 4are fastened to said rock-shaft by means of which the same may beoperated to ship/tho beihand the machine by hand. it tripper arr alsofastened to said rock is vided with a not-ch45 in its his n I proan .1 il nee one and may be used in 7 to disengage the tripper arm 44 from thearm 46 the rod 47 will be moved to shift the belt from the fast totheloose pulley thus stopping the machine. Said rod 47 is adapted to beoperated to stop the machine by'a. trippcr mechanism which I will nowproceed to describe.

Afdog 51, constituting a tripper, is fastened to a vertical shaft 52 andis constructed to engage a notch 53 in the end of the arm 33, so thatwhen the shaft 52 is rocked toward the right (Fig. l), the arm 33 willbe disenga from the dog 51 and the stop motion will be actuated to stopthe machine as hereinbefore described. The shaft 52 is rotatably mountedupon the bed plate 54 and is rotated by a spring 55 in a direction tobring a pin 56 fast'to said shaft against a bracket 57 in the lower endof which the shaft 52 is rotatabiy mounted. The shaft 52 is rotated theopposite direction to that in which it is rotated by the spring 55, ortoward the: right (Fig. 1)., to disengage the dog 51 from. the arm' 33by an armature lever 58 which is; actuated by .an*electro-- magnet, 59forming" a part of an electric cirsuit 60. The electromagnet 59 isfastened to the cross hefid 18 and is. connected by an electric w'r'e 61(see'Fig. 1) to one of the terminals v of the circuit closingdevice 63.-The other terminal 64 of said circuit closing device is connected by awire 65 with a bat tery 66 from which a wire 67 leads to a binding screw68 on the armature lever 58.

The free endof the, armature lever 58 normally contacts with ametalplate 39 w "ch is connected bya wire 70 with the magnet 59.

The circuit closing devibe 63 has a base 71 which is fastened to thecross tie l8 and on said base is mounteda block 72 of insulat-\ ingmaterial in which is slidably mounted a drop device 73 consisting ofawire bent in U-shapc, the legs i hconstituting contact points and theclosed end being bent at 75 to form a guide for a strand of yarn 7 6.

When said strand of yarn breaks or the supply runs out or when anabnormal tension is applied thereto, the legs 74, 74 Wlll be caused,in'a manner hereinafter described,

stop 5 ta. the contacts 77 which preferably consist'of mercuryinclosedin chambers 78 within the base 71': When the circuit is open the partswill be lathe position 11111:

trated in Fig. 1. When the circuit is closed .by the drop wire 73 theelectromagnet 59 will be energized and the armature 5S drawn toward thesame to rock the shaft 52 and disengage the. drop dog 5.]. from the endof the arm 33, whereupon the stop motion incohanis n, will be actuatethhereinbefore described, to move the belt 24 from the fast pulley 22 tothe loose pulley 25' and thus stop the machine.

Referring now to the circuit closing device illustrated in Figs. 3 to Jinclusive, the drop wire 75 is held out of contact with the contacts 77by the strand of yarn 76 which passes from a yarn mass 79 through aguide eye 80 provided in the auxiliary frame 81,

ttlnrough a yarn scraper 82 to the guide eye machine. scraper blades 89and 90 fastened by screws or bend 75 formed in the drop wire 73, thenceupwardly through a stationary guide eye 83, through a movable guide eye84- and through stationary guide eyes 85, 85 8G and 87 to the primaryneedles of the knitting; The scraper 8:2 consists of two 91 and 92,respectively, to the block 72. The screws 91 and 92 pass through slots93 and 94, respectively, in the blades 89 and 90, so that said bladescan be adjusted vertically or one can be adjusted toward the other tovary the space 95 between their adjacent edges. Amarossbar 96 isfastened to the blade 89 and forms a stop to prevent the waste yarn frompassing upwardly through the blades 95 and becoming entangled in thecircuit closing mechanism located beyond saidqscraper. A bar 97,preferably of porcelain, is fastened to the blade 89 and constitutes a'guide for the thread and by raising and lowering the blade 89 the dropwire 73 and its legs 74. will be. raised or lowered to move said legs orcontact points away from r toward the mercury contacts 77. The guEde eye83 is stationary and is fastened to he block 72 and in such a positionrelatively to the drop device that the thread or yarn 76, as it passesfrom the guide 75 to the guide 83, will be held in a substantiallyvertical direction. The object of this construction is to prevent thevibration of the thread while it is being fed into the niachine, whichvibration would occur if the thread extended in a. substantiallyhorizotnal instead of a vertical direction from the drop device to thethread guide 83, but when the thread is laid in a vertical directionthis vi 1' 'atio'n of the thread is prevented. A vibration of the threador yarn would lend to the contact points 74 making accidental contactwith the mercury contacts 77 when the thread had not broken or whenabnormal tension was not applied thereto, which would render the deviceinaccurate and unreliable.

The rhovable guide eye 84 is fastened to a Ushaped lever 98 pivoted at9/?) to the block This lever has an arm 100 thereon which .tivepositions illustrated in Figs. l, 2. I u l v n l, o and 8, it will beseen that the drop wirev '73 1s ralscd by the'tcnslon of the yarn 76,

projects over the. closed end of the U-shapcd drop wire 73 and forms astop ihercl or to prevent said wire from being; moved away from thecontacts TY more than a certain distance. This distance can be regulatedby an adjusting); screw llll which has screwthreaded engagement with thelever J and is adapted to engage the block T2, so that by turning saidscrtuv in one direction or the other. the free end of the arm lot) willbe raised or lowered and thus the position of the drop wire 73delm'mincd- "ihe lcveri 9b is provided with pins 10:2 upon which may beplaced slotted plates 10;} in order to apply the proper tension to theyarn To to hold the leccr Slb downwardly in substantially the positionillustrated in Fig. 5 with the screw .lOl. in contact with the bloclt 72under normal conditions or when the yarn is subjected to a-uorum ltension. Dill'crcnt sizes oil varn require more tension and for largershes two or more plates may be )laced upon the pins H12. in practice theweight of the lever Uh is suliicient tor certain sizes of yarn; then aplate 103 placed on the pins M2 for larger sizes and another plate .10?is placed on the pins .lUQ for still larger sizes, making it necessaryto employ only two plates .t'orall sizes of yarn ordinarily used inknitting machines. The drop wires 73 are also made of dill'crent sizedwire in order to drop quickly and have the contact points 'T-i engagethe mercury contacts 77 without loss of time when the yarn lu'ea s, as,for instance, when the yarn breaks between the drop wire 73 and theneedles it is necessary that ,the drop wire should be heavy enough topull the weight of the yarn left between said drop wire and the brokenend of the yarn ,witlu'ult delay and for a heavier yarn it-takes aheavier drop wire than for in light yarn to perform function. Therefore,three sizes of dro wires are utilized for all sizes of yarn ordinarilyused in. a knitting numhine.

The general operation of the mechanism hcrc'inhetore specificallydescribed is as fol lows: Assuming! a knitting machine to he inoperation and the parts to be in the relar),

so that the contact points 74 are out of contact .with the contacts T7and therefore, the electric circuit 60 is open. The guide 97 is'at sucha height relatively to the drop wire 73 and the arm 100 is in such aposition relatively to said drop wire that the contact points, whileclose to the contacts 77; do not engage the some. The adjusting screw.llll upon the lever 98 contacts with the block 72 at its lower end,"lhc yarn extends in substantially a horizontal direction from the guide97 totho guide 75 of i the (lIOI') wire 72: than said vm-n 7(3 or- Wirewith the contacts 77.

tends in a substantially vertical direction to l addition to the guideeye 83 for the reason hereinbefore set forth, vi7.., to preventvibration of the yarn during the operation of the machine and accidentalcontact or the drop From the guide eye 88 the yarn extends through theguide eye 84 and from the guide eye 8% to the guide eye 85 in such adirection as to for-111 a-bight, '(see Figiiti). The reason for thisarrangement is that when an abnormal tension is applied to the yarn thelever 08 will move'upwardly from the position illustrated in Fig. 5 tothat illustrated in Fig. 6. At the same time the arm 100 will positivelypush the drop wire 73 downwardly to engage the contacts 77 and close theelectric circuit. When the wire 73 is thus pushed downwardly by the arm100, it is evident that yarn must be paid out to said drop wire or thedevice will become locked and by fit ' invention is ,illustrated whichincludes the arrangement hereinbeforc set forth by which a bight isobtained in. the thread 76 adjacent to the thread guide Set this yarncan be paid out to a sufiicient extent so that no locking of themechanism by said yarn will occur. Thus, when abnormal tension isapplied to the yarn it will be understood that the lever 98 will berocked on its pivot from the position illustrated in Fig. 5 to thatillustratedjin Fig. 6 and the arm 100 will force the wire 73 downwardlyuntil the contact points 74 engage the contacts '77 and complete thecircuit. As soon the circuit is completed the armature lever 58 will be.

drawn toward theniagnet 59, causing the shaft 52 to roclmand the"tripper 53 to re lease the arm. 33, whereinaon the spring'36 willmovethe arm 33 and the wheel 30 so as to move the rod 37 to cause the arm4-1 on the rock-shaft 4:1 to become disengaged from the yarn 46,whereupon the spring 49 will cause the rod 47-120 move the shipper arms50, thus moving the belt from the fast to the loose pulley andstoppingthe machine. If the yarn should. break, then the drop Wire 73 will, ofits own weight, drop until the contact points 74 engage the con 77,completing the'circuit and causing motion mechanism. to be operated Thesamefwould rn ran out.

tacts the stop as hereinbefore described.

be true if the supply of ya It will be understood that one of theci'rcuit closing devices heroinbcfore described will be supplied foreach feed of yarn in a knitting machine and also that the circuit,

closing device is applicable to any marlllhe employinga strand of threador yarn for the purpose of closing an electric circuit to operate a mopmotion when the tension be"- comes abnormal upon said thread or yarn orwhen the thread or yarn breaks or when the supply of thread or yarn runsout.

In. Figs. 11 and 12 a modificatiorr'of my in the mechanism hereinbeforede-' scribed as constituting a circuit closing device a mechanism forcutting the yarn.- Referring to these figures, 82 is the 72 the block,71 the base, thread. guide, 84 the movable thread guide, 98 the lever towhich the movable thread guide 84 is fastened, said lever being pivotedat 99 to the block .72. The lever 98 has an arm 104 which is connectedby a link 105 to a movable cutter arm 106 pivoted at 107 to thestationary cutter 108. The stationary cutter 108 is fastened to thescraper blade 90. When abnormal. tension is applied to the yarn thelever 98 will be actuated as hereinbe ore described and Will be rockedupon its pivot 99, causing the arm 10 1 to able cutter 106 will berocked uponits pivot 107 to coact with the stationary cutter 108 andsever the yarn, whereupon the drop wire will descend and'close thecircuit and the machine will be stopped by the stop mechanism ashereinbefore described.

In Fig. 13 a modification of the cutting mechanism is illustrated inwhich the lever 109, corresponding in function to the lever 08, has anarm 110 thereon to which a cutter 111 is fastened, said cutter beingadaptedto coiiperate with a stationary cutter 112 fast to the scraperblade 90. vlVhenthe lever 109 is rocked by abnormal tension 'on thethread 84;, as hereinbefore described, said movable cutter will becaused to engage the yarn 76 I and cooperating with the stationarycutter 112 will sever said yarn, whereupon the drop wire 7;. willdescend and close the circuit, thus causing the stop-motion to beoperated to stop the machine, as hereinbefore described.

It will be understood that when the armature lever 58 is drawn towardthe magnet 59, as hereinbefore described, when the cir .cuit is closed,the free end of saidarmature lever 58 will move along the insulatedplate 69 until the armature lever is within close free end of saidarmature lever will slide ofi? of the plate 69 onto the block material69'.

nism will be actuated, as hereinbefore' described, and the circuit willbe left broken .coming'to rest with its free end on the insu- ..latingplate 69, whereby the electric circuit will not be rundown.

. Having thus described my invention, what I claim and desire by LettersPatent to 'secure'is: 1

1. A circuit closing device-having, in'cbmbination, an electric circuitincluding a drop device adapted to open and close said circuit andconstituting a guide for a strand of of insulating Thus the stop motionmechascraper, 83 the stationary descend and through the link 105 themovproximity to the magnet 59, whereupon the 76 which is guided by theguide eyes 83 and I by reason of the armature lever58 finally will befinally broken and thus the batteries yarm a plurality of guides forsaid yarn and means actuated by an almormal tension on, said yarnadapted to engage said drop device and move it; to close said circuit.

2. it circuit closing device having in cone hination, an electric crcuit inclmling a. drop device adapted to open and close said circuitand constituting a guide for a strand of yarn, a pluaility of guides forsaid ya rn, a lever adapted to engage said drop device and a guidetor'said yarn n'u'au'ztcd on said lever whereby, when nruler abnormaltension, said lever may he rocked by said yarn to move said drop deviceto close said circuit.

3. A circuit closing; device having, in cominnit-ion. an electriccircuit including; a drop device acapted to open and close said circuitand constituting a guide for a strand. of yarn a stz'itionary guide forsaid yarn at, one side nil? said. drop device, a movable flttitlt! forsaid yarn on the opposite side of said drop device and means connectedwith said movable guide and engaging said drop device adapted toheacuiated by an abnormal ten sion on said. yarn to move said drop deviceto close said. circuit iii) A. circuit closin device having, in com- 1nation, an electric circuit LilClllQllIlg a drop in 'ice intaptxed toopen and close said circuit and ccmatituting a guide for a strand ofdevice, another yarn guide interposed between said movable guide andsaid drop device audnieans connected with said movable guide andengaging said drop device adapt;- ed to he actuated by an abnormaltension on said yarn to more said drop device to close said circuits i5. A circuit. closii'ig device having in. comhinatioi an electric ciruit, inii' lnd'ing a drop device adapted to open 1 close said circuitand constituting a .1 ;e for a strand of yarn a statimmry guide for saidyarn at one side o1'said drop device a movable guide For said yarn onthe opposite side of said drop derictu another yarn guide interposed hetzvrccu said movable guide and said drop de vice and clevattal abovesaid movable guide and drop device and means connected with said movableguide and engaging said drop tl iw'ltt. iyjitcd to he :H'iiltltltlil byan abnormal tension on said yarn to move said drop device to close. s" 1:ircuit.

6. A. cu :urt ch rug device having, in cone hiuaiion, an electriccircuit including a drop device adapted to open and close said circuit;and constituting a guide for a strand of yarn a plurality of guides t'crsaid yarn, a lever adapted to engage said drop device. a pivot; for saidlever means to vary the weight oi? said lever one side of said pivot anda guide for said yarn mounted on said lever whereby when under abnormaltension said lever may he rocked by said yarn to move said drop deviceto close said circuit.

7. A circuit; closing device having; in comhinatiom an electric circuit.including' a drop device adapted to open nd close said circuit andconstituting a. guide For a strand of yarn, a plurality of guides forsaid yarn, a lever adapted to engage said dropdevice, a pivot for saidlever, a weight adapted to be dctacha'oly fastened to said lever at oneside of said pivot and a guide for said yarn mounted on said lever,whereby when under abnormal tension said lever may he rocked by saidyarn to move said drop device to close said circui 8. A circuit closingdevice having, in com bination, an electric circuit: including twocontacts, a drop device adapted to engage said contacts and close saidcircuit, said drop device constituting a guide to- .a strand of yarn,guides for said yarn on opposite Sides. respectively, of said dropdevice. one of said guides being adjustable vertically whereby, throughsaid yarn, said drop device may he adjusted relatively to said contacts,a stop adapted to engage said 'drop device to limit the distance towhich it may he moved away from said contacts and means actuated by anabnormal tension on said yarn adapted to move said stop to bring saiddrop device into engagement with said contacts.

9. A. circuitv closing device having, in co1nhination, an electriccircuit including a drop device adapted to open and close said circuitand constituting a. guide for a strand ot yarn,'a' plurality (if-guidesin said yarn and me'a'ns normally independent of said drop device andadapted to be actuated by an ahngrmal tension on said yarii to engagesaid d op device and move it to close said circuit.

10. A circuit closing delvice havina'. in combination, an electriccircuit including a drol-i device adapted to open and close saidcircuitand constitut'i'ug, a guide for a strand of yarn, a plurality ofguides for said yarn, a loner adapted. to engage said drop device andguide for said yarn mounted on said lever wherchy, when under abnormaltension said iever may he rocked hysaid yarn tomove saidtdrop device toclose said, dirt-nit. the relatiivc'location of said partsl being suchthat When said drop device is moved dmvn 'WZLI'Cllyi to close saidcircuit said lever yarn guide will he moved to feed yarn therc't o.

11. circuiticilosing device including an electric circuit, a drop deviceadapted to open and closesaid circuit and constituting 12. A knittingmachine having, in combination, a series of needles, a support therefor,a mass of yarn, a stop motion mechanism including a tripper, an electriccircuit including an elect-romagnet adapted, when said circuit isclosed, to actuate said tripper to release said stop motion mechanism,said electric circuit embodying a pair'of contacts and a drop deviceconstituting a guide for yarn adapted to engage said contacts and closesaid circuit and guides whereby said yarn, when under tension, isadapted to hold said drop device out of engagement with said contacts,one of said guides constituting a yarn scraper and located between saiddrop device and yarn mass.

13. A knitting machine having, in combi nation, a series of needles, asupporttherefor, a mass of yarn, a stop motion mechanism including atripper, an electric circuit including an eleetromagnet adapted, whensaid circuit is closed, to actuate said tripper to release said stopmotion mechanism, said electric circuit embodying a pair of contacts anda drop device constituting a guide for I yarn adapted to engage saidcontacts and close said circuit, guides whereby said yarn, when undertension, is adapted to hold said drop device out of engagemet with saidcontacts, one ofsaid guides constituting a yarn scraper and locatedbetween saiddrop deviceand yarn mass and means operated by said yarnwhen under abnormal tension to move said drop device into engagement,with said contacts.

14. "A circuit closing device having, in combination, an electriccircuit including two contacts, a U-shaped drop Wire, the legs of whichare adapted to engage said contacts and close said circuit, the closedend of said U-shaped Wire having a bend therein onstitilting a guide fora strand of yarn, a stop adapted to be engaged by the closed end ofsaid. tl shaped Wire to limit the distance to which said Wire may bemoved awayfrom said contacts and means actuated by an abnormal tensionon said yarn adapted to move said stop to bring the legs of said U-shaped wire into engagement with said contacts.

1:3.- A circuit closing device having, in combination, an electriccircuit including'a drop device adapted to open and close said circuitand constituting a guide for a strand of yarn, a plurality of guides forsaid yarn; cutting instrumentalities and means actuated by an abnormaltension on said yarn adapted to engage said drop device and move it toclose said circuit, said means also adapted to actuate said cuttinginstrumehtalities to sever said yarn.

16. A. circuit closing device having, in combination, an electriccircuit, including a drop device adapted to open and'close said circuitand constituting a guide for a strand of yarn, a pluralitysof guides forsaid yarn,-

a stationary cutter blade, a lever adapted to engage said drop device, aguide for said yarn mounted on said lever, and a movable cutter actuatedby said lever adapted to co-.

act with said. stationary cutter to sever said whereby under abnormaltension said be rocked by said yarn to sever me and move said drop Wireto close rcuit. imony whereof I have hereunto set see. VHLLIAM W. BURKE.Witnesses N. EsrAsiaoon,

Runner Henna,

hand in presence of two subscribing wit-

